text: /* Compatibility definitions for System V `poll' interface.
     Copyright (C) 1994-2014 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, see
     <http://www.gnu.org/licenses/>.  */
  
  #ifndef	_SYS_POLL_H
  #define	_SYS_POLL_H	1
  
  #include <features.h>
  
  /* Get the platform dependent bits of `poll'.  */
  #include <bits/poll.h>
  #ifdef __USE_GNU
  /* Get the __sigset_t definition.  */
  # include <bits/sigset.h>
  /* Get the timespec definition.  */
  # define __need_timespec
  # include <time.h>
  #endif
  
  
  /* Type used for the number of file descriptors.  */
  typedef unsigned long int nfds_t;
  
  /* Data structure describing a polling request.  */
  struct pollfd
    {
      int fd;			/* File descriptor to poll.  */
      short int events;		/* Types of events poller cares about.  */
      short int revents;		/* Types of events that actually occurred.  */
    };
  
  
  __BEGIN_DECLS
  
  /* Poll the file descriptors described by the NFDS structures starting at
     FDS.  If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
     an event to occur; if TIMEOUT is -1, block until an event occurs.
     Returns the number of file descriptors with events, zero if timed out,
     or -1 for errors.
  
     This function is a cancellation point and therefore not marked with
     __THROW.  */
  extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout);
  
  #ifdef __USE_GNU
  /* Like poll, but before waiting the threads signal mask is replaced
     with that specified in the fourth parameter.  For better usability,
     the timeout value is specified using a TIMESPEC object.
  
     This function is a cancellation point and therefore not marked with
     __THROW.  */
  extern int ppoll (struct pollfd *__fds, nfds_t __nfds,
  		  const struct timespec *__timeout,
  		  const __sigset_t *__ss);
  #endif
  
  __END_DECLS
  
  
  /* Define some inlines helping to catch common problems.  */
  #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
  # include <bits/poll2.h>
  #endif
  
  #endif	/* sys/poll.h */
  